Periodic_3TriangulationDSCellBase_3 Concept Reference

Definition

A refinement of the concept TriangulationDSCellBase_3 which adds an API for offsets.

At the base level (see Sections Software Design and Software Design), a cell stores handles to its four vertices and to its four neighbor cells. The vertices and neighbors are indexed 0, 1, 2 and 3. Neighbor i lies opposite to vertex i.

For periodic triangulations, the cell base class needs to additionally store an offset for each vertex. Only the last three bits of each integer are required to be stored. The remaining part does not contain any information.

Refines

TriangulationDSCellBase_3

Has models

CGAL::Periodic_3_triangulation_ds_cell_base_3

See also

TriangulationDataStructure_3

TriangulationDSCellBase_3

Periodic_3TriangulationDSVertexBase_3

Access Functions
int	offset (int i) const
	Returns the offset of vertex i.

Setting
void	set_offsets (int off0, int off1, int off2, int off3)
	Sets the vertex offsets according to off0 to off3.

Member Function Documentation

offset()

int Periodic_3TriangulationDSCellBase_3::offset

(

int

i

)

const

Returns the offset of vertex i.

Precondition

\( i \in\{0, 1, 2, 3\}\).